set unique key

src/client/js/components/Admin/Users/UserInviteModal.jsx

@@ -124,7 +124,7 @@ class UserInviteModal extends React.Component {
         {userList.map((user) => {
           const copyText = `Email:${user.email} Password:${user.password} `;
           return (
-            <CopyToClipboard text={copyText} onCopy={this.showToaster}>
+            <CopyToClipboard key={user.email} text={copyText} onCopy={this.showToaster}>
               <li key={user.email} className="btn">Email: <strong className="mr-3">{user.email}</strong> Password: <strong>{user.password}</strong></li>
             </CopyToClipboard>
           );